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The stated purpose of the puzzles each year was to recruit "highly intelligent individuals", although the ultimate purpose remains unknown. [2] Theories have included claims that Cicada 3301 is a secret society with the goal of improving cryptography, privacy, and anonymity or that it is a cult or religion.
Occasionally, cryptogram puzzle makers will start the solver off with a few letters. A printed code key form (the alphabet with a blank under each letter to fill in the substituted letter) is usually not provided but can be drawn to use as a solving aid if needed. Skilled puzzle solvers should require neither a code key form nor starter clue ...
The Mammoth Book of Secret Codes and Cryptograms. Constable & Robinson. p. 500. ISBN 0-7867-1726-2. Dunin, Elonka (2009). "Kryptos: The Unsolved Enigma". In Daniel Burstein; Arne de Keijzer (eds.). Secrets of the Lost Symbol: The Unauthorized Guide to the Mysteries Behind The Da Vinci Code Sequel. HarperCollins. pp. 319–326. ISBN 978-0-06 ...
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"The Adventure of the Dancing Men" code by Arthur Conan Doyle: Solved (solution given within the short story) 1917 Zimmermann Telegram: Solved within days of transmission 1918 Chaocipher: Solved 1918–1945 Enigma machine messages Solved (broken by Polish and Allied cryptographers between 1932 and 1945) 1939 D'Agapeyeff cipher: Unsolved 1939–1945
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The Abwehr code had been broken on 8 December 1941 by Dilly Knox. Agents sent messages to the Abwehr in a simple code which was then sent on using an Enigma machine. The simple codes were broken and helped break the daily Enigma cipher. This breaking of the code enabled the Double-Cross System to operate. [19]
Parsons' programming puzzles became known as Parsons puzzles [2] and then Parsons problems. [3] Parsons problems have become popular as they are easier to grade than written code while capturing the students problem solving ability shown in a code creation process.